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Try working backwards:
What fraction of the total time for the cinema and shopping is the
$10$ minutes of shopping?
So how long did they spend in total watching the film and
Continue like this....
My friends and I love pizza. Can you help us share these pizzas
How can you cut a doughnut into 8 equal pieces with only three cuts
of a knife?
Grandma found her pie balanced on the scale with two weights and a
quarter of a pie. So how heavy was each pie?